In a alternate universe somewhere Charles Xavier meets a man named Fester while he is sent as a little kid to the psych ward by his mother, whose mind is as insane as everyone inside the building but it’s paradoxically the calmest and most fascinating mind he has ever felt in his short life and he learns that he man is there ON VACATION of all things and he realizes that “no I’m not insane the voices are other people’s thoughts” way quicker with Fester’s help and he is kidnapped/adopted into the Addams clan where he and his telepathy flourishes
He comes back to the mansion at some point. Kurt Marko dies of mysterious circumstances. Sharon Xavier is… gently persuaded by a very convincing Morticia to hand over the custody of Charles. Cain and Pugsley become friends somehow and Cain learns the joys of dynamite.
They go live in the Xavier Mansion as a collective family vacation/ family trip/ family acclimation for Charles.
Then one day he meets a blue little girl in the kitchen and knows instantly that her and Wednesday are going to go so well together like a house on fire
And life is good
Than First Class happens and Erik is not ready for Charles Addams Xavier, he just isn’t